diff --git a/src/tests/xpra/test_apps/test_window_maxsize_GTK3.py b/src/tests/xpra/test_apps/test_window_maxsize_GTK3.py
new file mode 100755
index 0000000000..0fd6e6ab48
--- /dev/null
+++ b/src/tests/xpra/test_apps/test_window_maxsize_GTK3.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+
+from gi.repository import Gtk, Gdk	#@UnresolvedImport
+
+
+def main():
+	window = Gtk.Window(Gtk.WindowType.TOPLEVEL)
+	window.set_size_request(300, 200)
+	window.connect("delete_event", Gtk.main_quit)
+	window.show_all()
+	geom = Gdk.Geometry()
+	geom.max_width = 600
+	geom.max_height = 400
+	hints = Gdk.WindowHints.MAX_SIZE
+	window.set_geometry_hints(window, geom, hints)
+	Gtk.main()
+	return 0
+
+
+if __name__ == "__main__":
+	main()